Fluid collection self-locking, self-blunting safety needle system and syringe
The invention is related to a particular type of safety needle and syringe. The needle has a locking device which can be used with or without a syringe. The needle is cylindrical with one surface flattened out. The Blunting member is aligned within the needle. With the intake of fluids the blunting instrument moves out, blocks the needle tip and locks inside the needle. Thus preventing reuse and needle stick Injury.
This is a Section 371 National Stage application based on PCT International Application No. PCT/US08/03647, filed on Mar. 20, 2008, claiming priority from U.S. Provisional Patent Application No. 60/919,454 filed on Mar. 22, 2007.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENTNot applicable.
THE NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENTNot applicable.
INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISCNot applicable.
BACKGROUND OF INVENTION1. Field of the Invention
The present invention relates to a safety needle system and syringe. The safety needle system may be used with a hypodermic syringe, IV Catheter, and for every other medical or industrial purpose. The invention is also broadly applicable to needles connected to fluid transfer devices other than syringes, and applications in medical and non-medical use. The needle is a self blunting instrument which after intake of fluid prevents needle stick injuries.
The needle is safe during and after use, the safety feature being an integral part of the design. The intention is to create a simple low cost self blunting needle system and syringe which does not require human action to activate the safety feature.
The invention requires no additional learning or training by the medical or non-medical staff for the blunting of the needle.
2. Description of Related Art
Syringes have been designed to prevent reuse or have automatic or mechanical safety features. U.S. Pat. No. 4,233,975 discloses a syringe in which a plug is positioned in the syringe to be pushed into a position of blocking flow to and from the syringe needle passage.
U.S. Pat. No. 3,478,937 discloses a syringe in which the plunger stem 23 has a collar unit 25 secured thereon which, when the plunger is pushed through the barrel 11 of the hypodermic syringe, it passes through ring 26 mounted at one end of the barrel to prevent subsequent retraction of the plunger for refuse of the device.
US Pat No. 2005/0027263 for an IV Catheter includes a unitary, resilient needle guard received in a catheter hub. The needle guard includes a proximal arm or wall that includes an opening through which a needle passes for axial movement. When the needle is retracted from the catheter, it releases the force that had previously prevented movement of the needle guard within into a position in which it is clamped onto the needle shaft and in which its distal wall blocks access to the needle tip. In the condition, the spring needle guard and needle can be removed from the catheter hub. A slot or crimp may be formed in the needle shaft that engages with the needle guard after the protected needle and needle guard are removed from the catheter hub, thereby to prevent removal of the protected needle from the needle guard.
U.S. Pat. No. 6,814,707 discloses a blood collection device which includes a syringe assembly containing a slidable needle assembly within the cavity of a syringe body. The invention retracts the needle within a disposable syringe.
US Patent Application Publication No. US 2003/0093038 discloses a needle retraction type safety syringe in which the passive needle retraction element after engaging with the active needle retraction element can be forced to separate from the positioning restriction of the second positioning means that the needle can be retracted into the barrel by pulling back the push rod.
U.S. Pat. No. 4,892,107 discloses a single use safety blood collection device, which permits retraction of the hypodermic needle after its use into the sleeve of the device, itself to thereby to encapsulate the used needle. Once the needle is retracted after use it cannot thereafter be extended again.
BRIEF SUMMARY OF THE INVENTIONIn a first separate aspect, the present invention is a device that makes the use of, syringes and needles safe during and after use, while in-taking fluids.
In a second separate aspect, the safety feature being an integral part of the invention is activated with routine use of the product. The self blunting needle system and syringe does not require human action to activate the safety feature, thus reducing chances of error.
In a third separate aspect, as the safety feature does not require additional action to activate, this eliminates the learning curve for the use of the product.
In a fourth separate aspect, the changes and modifications to the syringe are made to create a simple low cost self blunting needle system and syringe.
The foregoing and other objectives, features and advantages of the invention will be more readily understood upon consideration of the following detailed description taken in conjugation with the accompanying drawings.
The invention can be better understood with reference to the following drawings. The elements of the drawing are not necessarily to scale relative to each other, emphasis instead being placed upon clearly illustrating the principles of invention.
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- 101—Hypodermic syringe
- 102—Syringe tube
- 103—Flattened surface along syringe tube
- 104—Plunger rod
- 105—Normal plunger arm
- 106—Flattened plunger arm
- 107—Thumb rest
- 108—Plunger head support
- 109—Cavity between plunger arms and plunger head
- 110—Plunger head
- 111—Plunger head flattened surface
- 112—Plunger head extension
- 113—Syringe cavity
- 114—Syringe depression
- 115—Fulcrum point
- 116—Syringe head
- 117—Syringe head flattened surface
- 118—Needle generally
- 119—Needle mouth
- 120—Needle mouth flattened surface
- 121—Needle tube
- 122—Needle cavity
- 123—Needle tube flattened surface
- 124—Needle opening
- 125—Needle curvature
- 126—Needle puncture tip
- 127—Needle tip angle
- 128—Needle mouth and needle tube touch
- 129—Blunting member stopper
- 130—Alternate blunting member stopper
- 131—Moving member
- 132—Blunting member
- 133—Blunting member cavity
- 134—Blunting member flattened surface
- 135—Blunting member curvature
- 136—First indent
- 137—Sheathing indent
- 138—Puncture tip protector
- 139—Moving member blunting member edge
- 140—Moving member plunger head edge
- 141—Plunger head extension guide
- 142—Moving member stopper
- 143—Blunting member guide
- 144—Moving member incline lower part
- 145—Moving member incline higher part
- 146—Releasing joint releasing part
- 147—Releasing joint released part
- 148—Fulcrum point stopper
- 149—Fulcrum point incline
- 150—Fulcrum point released part
- 151—Moving member fulcrum joint
- 152—Moving member extension
- 153—Non releasing plunger head extension guide
- 154—Blunting member thickness variation
- 155—Blunting member outward indent
- 156—Blunting member transition in shape
- 157—Multiple blunting members
The invention comprises of the following components;
A blunting member 132 is placed inside the needle member 118. Blunting member 132 may extend outside the needle mouth 119 into the syringe tube 102 or one of the parts of the blunting member 132 can extend outside the needle mouth 119 into the syringe tube 102 to be pushed by the moving member 131 or the moving member 131 can have an extension going into the needle tube 121 to push the blunting member 132, as shown in
Fulcrum point 115 on the syringe depression 114 provides a pivot point for the moving member 131. Fulcrum point 115 also stops movement of the moving member 131 in one direction. Fulcrum point 115 has a snap fit to provide ease of assembly to the moving member 131. Moving member 131 stays attached to the fulcrum point 115 or alternately the fulcrum point 115 allows the release of the moving member 131 after pushing the blunting member 132 further into the needle tube 121 to sheath the needle puncture tip 126 as shown in
At least one moving member 131 is placed inside the syringe tube 102. Moving member 131 may be attached to the fulcrum point 115 on the syringe depression 114 as shown in
Plunger rod 104 extends into plunger head 110 flattened at one surface 111 aligned with the flat surface of the syringe tube 103. Plunger head 110 has a plunger head extension 112 that attaches or fastens to the moving member 131, pulls it with the pulling action of the plunger rod 104, and detaches after pushing the blunting member 132 further into the needle tube 121 to sheath the needle puncture tip 126, as shown in
Syringe tube 102, flattened plunger arm 106, plunger head 110, syringe head 116, needle mouth 119, and blunting member 132 have a flattened surface for alignment.
The plunger arms extend into a plunger head support at 108. There is a cavity 109 between the plunger arms and the plunger head 110. The plunger head 110 has a flattened surface 111 to align with the flattened surface of the syringe tube 103. From the plunger head 110 emerges plunger head extension 112 into the syringe cavity 113. The plunger head extension 112 fastens or is attached to the moving member 131, pulls it with the pulling action of the plunger rod 104, and detaches after pushing the blunting member 132 further in to the needle tube 121 to sheath the needle puncture tip 126. Inside the syringe tube 102 there is a raised surface, syringe depression at 114 with fulcrum point 115. Syringe depression at 114 is represented in detail in
Continuing with
The needle mouth 119 when affixed to the syringe head 116, brings the blunting member 132 in alignment with the plunger head extension 112. The needle puncture tip 126 has a small inward or outward curvature at 125. The needle puncture tip 126 extends upward at an acute angle at needle tip angle 127. The blunting member 132 has two indents. The first indent 136 allows for the blunting member to smoothly glide over the needle curvature 125.
The sheathing indent 137 is curved to correspond with the curvature in the needle 125.
The blunting member 132 can be of any shape or there may be transition of shape which allows for the free flow of fluids as shown in
There is at least one moving member 131 placed inside the syringe tube 102. Moving member 131 is fastened or attached to the fulcrum point 115 on the syringe depression 114.
The moving member 131 comprises of moving member plunger head edge 140 and moving member blunting member edge 139 that are either straight, curved or a combination thereof. Moving member's blunting member edge 139 pushes the blunting member 132 further into the needle tube 121 to sheath the needle puncture tip 126.
Moving member 131 has a blunting member guide 143 to guide the movement of blunting member 132. Blunting member guide 143 is either flat, raised, depressed, textured, have gear teeth or a combination thereof, as a means of guiding the blunting member 132.
Moving member 131 has a plunger head extension guide 141 that is either flat, raised, cut-out, depressed or a combination thereof to guide the movement of moving member 131 when pulled by the plunger head 110 or plunger head extension 112.
Moving member 131 has an incline to facilitate assembly and movement in one direction. The moving member incline has a lower part 144 and higher part 145. Moving member has a stopper 142 to stop movement in one direction. Moving member has a moving member fulcrum joint 151 which attaches or fastens to the fulcrum point 115.
Releasing joint has two parts one being the releasing joint releasing part and the other part being the releasing joint released part. Either one of them can be on the moving member 131 or the other on the plunger head extension 112. Releasing joint is also used when there are multiple moving members as shown in
While the above description contains much specificity, these should not be construed as limitations on the scope of the invention, but as exemplifications of the presently preferred embodiments thereof. Many other ramifications and variations are possible within the teachings of the example. Thus the scope of the invention should be determined by the appended claims and their legal equivalents, and not only by the examples given.
Sequence ListingNot applicable
The present invention has been made to protect the health of medical and non-medical persons who face the risk of needle stick injury . . . Devices of this invention may be employed to extract or expel fluids or gasses for both medical and non-medical purposes.
Claims
1. A self locking and self blunting safety syringe comprising:
- a needle assembly comprising: a needle tube, a needle puncture tip, and a blunting member placed in the needle tube; and
- a syringe assembly comprising: a syringe tube, a plunger rod, and a moving member;
- wherein backward pulling action of said plunger rod pulls said moving member to rotate said moving member about an axis perpendicular to a longitudinal axis of said safety syringe, and wherein rotation of said moving member pushes forward said blunting member inside said needle tube distally past said needle puncture tip to sheathe and lock said needle puncture tip from inside said needle tube.
2. The safety syringe of claim 1, wherein said plunger rod has a plunger head attached to said moving member to guide movement of said blunting member into said needle tube, and after pushing said blunting member into said needle tube, said plunger head releases said moving member.
3. The safety syringe of claim 2, wherein said plunger head has a plunger head extension attached to said moving member to guide movement of said blunting member forward into said needle tube, and after pushing said blunting member forward into said needle tube, said plunger head extension releases said moving member.
4. The safety syringe of claim 1, wherein said needle tube has an alternate blunting member stopper to stop said blunting member and parts thereof from falling out of a needle mouth while allowing movement in forward direction towards said needle puncture tip.
5. The safety syringe of claim 1, wherein said blunting member and parts thereof provide alignment to move inside said needle tube while allowing fluid flow of fluids inside said needle tube.
6. The safety syringe of claim 1, wherein said blunting member has a blunting member curvature to stop said blunting member and parts thereof from falling out of a needle mouth while allowing movement in said forward direction towards said needle puncture tip.
7. The safety syringe of claim 1, wherein said blunting member has a variation in thickness to stop said blunting member and parts thereof from falling out of a needle mouth while allowing forward movement towards said needle puncture tip.
8. The safety syringe of claim 1, wherein said blunting member placed inside said needle tube extends into said syringe tube to allow said blunting member being pushed by said moving member.
9. The safety syringe of claim 3, wherein said moving member allows reversal of direction of motion by backward pulling action of: said plunger head; and said plunger head extension.
10. The safety syringe of claim 1, wherein:
- said moving member is placed inside said syringe tube;
- said moving member has a moving member blunting member edge and a moving member plunger head edge;
- said moving member is attached to a fulcrum point on a syringe depression; and
- said moving member is alternately placed between said syringe depression and a syringe head.
11. The safety syringe of claim 1, wherein said moving member has a moving member extension going into said needle tube to push said blunting member forward toward said needle puncture tip.
12. The safety syringe of claim 3, wherein said moving member has a plunger head extension guide on said moving member that:
- allows attachment to said plunger head extension;
- allows being pulled by said plunger head extension;
- guides movement of said moving member when pulled;
- allows detachment from said plunger head extension;
- allows attachment to said plunger head;
- allows being pulled by said plunger head;
- guides movement of said moving member when pulled by said plunger head; and
- allows detachment from said plunger head.
13. The safety syringe of claim 10, wherein said moving member has said moving member blunting member edge to push said blunting member.
14. The safety syringe of claim 13, wherein said moving member blunting member edge guides said blunting member and parts thereof.
15. The safety syringe of claim 1, wherein said moving member has an incline to guide movement direction of said plunger rod.
16. The safety syringe of claim 1, wherein said moving member has a moving member stopper to guide movement and direction.
17. The safety syringe of claim 1, wherein said syringe tube has a syringe depression that is a raised member inside said syringe tube to provide: position for a fulcrum point; guiding movement of said moving member; and to limit excess movement of said moving member.
18. The safety syringe of claim 17, wherein said fulcrum point on said syringe depression: provides a pivot point for said moving member; guides movement of said moving member; guides direction of said moving member; attaches to said moving member; and releases said moving member.
19. The safety syringe of claim 1, further comprising a releasing joint which joins parts inside said syringe tube to other parts and comprises:
- a releasing joint released part, and
- a releasing joint releasing part; and
- wherein said releasing joint releasing part releases said releasing joint released after required movement.
20. The safety syringe of claim 1, wherein backward pulling action of said plunger rod pushes said blunting member forward to sheathe and lock said needle tip during intake of fluids.
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Type: Grant
Filed: Mar 20, 2008
Date of Patent: Dec 17, 2013
Patent Publication Number: 20100036316
Inventor: Arpita Agrawal (Chicago, IL)
Primary Examiner: Nicholas Lucchesi
Assistant Examiner: Nathan R Price
Application Number: 12/450,262
International Classification: A61M 5/00 (20060101);